Aquarium tank



FIG. 1 is a perspective view of an aquarium tank showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a right side elevational view thereof.

The ornamental design for aquarium tank, as shown and described.